Where are you at in Oregon? If you are near the coast, it may be that they will do well enough outside all the year. I grew both of these when I lived in Japan (outdoors), and continue to grow both of them here in Michigan (outdoors late spring-mid autumn; in the greenhouse the rest of the time); grow them under more shade than standard cymbidiums, keep evenly moist--some of my sinense are grown in sphagnum, some in a CHC blend--and in relatively deep narrow pots (google cymbidium pot), as they will put out rather long roots. I fertilize mine copiusly most of the year, though cut back on both water and food in the winter (mid Dec-mid Feb). All in all, they are pretty hardy easy to grow plants. Hopefully cymbidiumladye will chime in here as well, I believe that she grows both of these...
Adam
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I've never met an orchid I couldn't kill...
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